Abstract:In order to study the effect of different ethanol concentrations on the extraction of the main functional components of loquat leaves and provide technical reference for production and utilization，loquat leaves dried under the condition of hot air drying at 65℃were used as raw materials to extract with ethanol solutions of different concentrations，and the changes of flavonoids，total phenols，polysaccharides and antioxidant properties were determined.The results showed that with the increase of ethanol concentration，the main functional components and antioxidant properties of loquat leaves increased first and then decreased.In general，50%and 70%ethanol had the best extraction effect，of which 50%ethanol had better extraction effect on total phenol and polysaccharide and 70%ethanol had better extraction effect on flavone.Therefore，in the production based on total phenol and polysaccharide，extraction with 50%ethanol as solvent could obtain better extraction effect.However，70%ethanol was the best extraction method for flavonoids.